From mboxrd@z Thu Jan 1 00:00:00 1970 From: Diwaker Gupta Subject: Xen cluster n/w performance (again!) Date: Sat, 20 Nov 2004 22:37:18 -0800 Message-ID: <1b0b4557041120223710ff1f54@mail.gmail.com> Reply-To: Diwaker Gupta Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: Sender: xen-devel-admin@lists.sourceforge.net Errors-To: xen-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: xen-devel@lists.sourceforge.net List-Id: xen-devel@lists.xenproject.org Hey everyone, A few weeks back there was some discussion on Xen's I/O performance in clusters on the list. I did some experiments today myself using iperf (not ttcp): o Xen dom0 talking to another machine in the cluster running native linux: b/w around 904Mbps, thats nice :) o Xen VM (running on the same machine as the dom0 in the previous experiment) talking to another machine running native linux (again, same as in previous experiment) only achieves 128 Mbps I read on the list that you folks at Cambridge got upto 800+ Mbps across VMs? Did you guys do any special optimizations or set any special parameters? I read something about socket buffer size? Thanks, -- Diwaker Gupta http://resolute.ucsd.edu/diwaker ------------------------------------------------------- This SF.Net email is sponsored by: InterSystems CACHE FREE OODBMS DOWNLOAD - A multidimensional database that combines robust object and relational technologies, making it a perfect match for Java, C++,COM, XML, ODBC and JDBC. www.intersystems.com/match8